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Leading axis theory: Difference between revisions
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[[Index Of]] in [[SHARP APL]] was not extended to apply to left argument [[major cell]]s as in J and Dyalog; instead it was given rank <source lang=apl inline>1 0</source> making such a change impossible. The leading-axis extension of scalar dyadics in SHARP is a direct consequence of given them a function rank 0, as SHARP's concept of function rank includes [[ | [[Index Of]] in [[SHARP APL]] was not extended to apply to left argument [[major cell]]s as in J and Dyalog; instead it was given rank <source lang=apl inline>1 0</source> making such a change impossible. In [[A+]] not only [[Index Of]] but also [[Membership]] was changed to follow the leading axis model, breaking compatibility with other APLs. A+ also restricts [[Take]] and [[Drop]] to allow only a [[singleton]] left argument (but any right argument rank is permitted). The leading-axis extension of scalar dyadics in SHARP is a direct consequence of given them a function rank 0, as SHARP's concept of function rank includes [[prefix agreement]]. | ||
== History == | == History == | ||